Improved method of distilling in vacuo



i eration in cacao; and I do hereby de c steams enters.

i the barrel G.

the chamber' C.

is in communication, by the pipe and the short FREDERIC eufrzuow, i 0EySAN ERANcISoo,eALiEoRNI-` Laim Patent No. 103,604, ma May 31, 1870.

rMPRovED METHOD 'or' DISTILLING IN vacuo.

The Schedule referred to in these Letters Patent and making part oi' thesame To all whom it may concern:

Be it known that I, FREDERIC Gurzxow, of the city and county of SanFrancisco, State of California, have invented certain new and usefulImprovements in the Method of Distillation or Evapolare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawing and to the letters marked thereon.

The nature of my invention consists of certain-details or improvementsby which the steamwhich is required to supply the caloric in a closedv'esssel is caused to produce a more or less complete vacuum in the sameclosed vessel.

In the drawing the figure representedis a vertical sectional elevationof a still, having my improvements.

To enable others. skilled in theart or science to which it most nearlyappertains to make and use my invention, I will proceed to' describefully its const-ruction and operation.

A B C represent the different compartments of an ordinary still employedfor the distillation of spirits from the malt, andheated by steam.

It will be observed that- A is the lowest compartment, and into whichthe D is a doubler, and

E'an ordinary worm condenser, and the spirit condensed in E runs intothe reservoir F, and collects in H is the reservoir for the cold washwhich supplies The whole pparatus is to be practically air-tight, andstrong enough to withstand the vacuum in the interior.

In distilling spirits in a still the ordinary method, the steam from theliquid in A would, as F, communicate with the atmosphere, have toovercome the pressure of the atmosphere, added to the pressure exercisedby the liquid columns in B C and D.

In the improvement claimed by me, in chamber of this description, by

and'narrow pipe J1, with the steam-pipe w, which heats the still, andthe steam entering from th,e nozzle a, and expanding into'the pipe b,overcomes the atmospheric pressure on the area of b, and produces acontinuous vacuum 1n x.

The pipe b ought to b may be a mere ring laid steam-pipe w. i

Y More important than the length of this pipe'b is its diameter, forobtaining the desired vacuum in x.

This diameter has to be in close proportion to the e asshortImpossible;A in fact, in e opening of the larger pressure andweight ofthe steam'ssuing from the orifice a, and may be found by thefollowing formula:

where o; means the area of the steam-pipe, a, B that of the pipe, b andj the pressure of the steam in a, over the atmosphere, expressed b onesquare inch.

It the pipe b is constructed by this formula, the alcoholic vapor in'xwill rush into the vacuum formed in b in the same manner as if thepistou of an airpump of the area B is continuously moving forward in bwith the velocity of about one thousand feet per' second.

The steam mixed with the vapor will pass through the coil w in A, anddischarge through a perforated pipe either into the same still A, orintoythe open reservoir H, or another still or reservoir, where itsremaining caloric, and itspercentage in alcohol, can be advantageouslyemployed.

y If w discharges into A, and the. weight of the fl s eontinousl y, thatis,

the spent wash and the finished spirit flow in `a continuous stream intotlreatrnosphere.

The following description will explain the manuel' how it is performed:l f

Steam is turned on in a, the stop-cocks d and fare open, 'all the otherstop-cocks are closed. The cold wash will owthrough f into c as soon asthe desired vacuum is reached, till c, overflow through g and p into B,through 0 and l into A.

IVhen a water-guage in A shows that the proper level is reached f isclosed, and when a manometer in A shows that the proper vacuum exists Zis closed and e opened. y

The only attention requisite of this apparatus hereafteris theregulatingot' the waterflevel in c by the stop-cocks j, and of thevacuum iu A by allowing any air brought in by leakage, or set free fromthe boiling wash, to eseape,.from time to time, into the atmosphere byclosing e and opening d 'for a short while.V i The manner of producingthe continual overflow of the wash from one compartment to the robber isshown clearly enough by the horizontal pipes m g and 0,'and theverticalpipes u p and 1,'the liquid in the vertical pipes standingalways higher thaniin t-he com. partment with which they communicate. l

After the same principle, the 'spent wash will How from A through r intos, in which pipe s theV atmosphere, pressing at they surface of the washin the well' y'pounds avoirdupois per uid y columns inthe apparatus A BOD is equal to sixinches -t-hree inches of mercury wit-hin t, keeps theliquid to a height corresponding with the vacuum existing in A, saytwenty-ve feet for a vacuum of twenty-three inches mercury in A.

From the well t the spent wash 'may flow off, or be pumped vup by theordinary means. Also, the finished ting sirups or other iiuids.

Having thus described my invention, 4What I claim and ent, is l Thechamber F connected to the steam-pipe w, by means of the pipes z and b,arranged substantially in the manner described, for the purpose-setforth.

In testimony whereof I have hereunto set my hand and seal.

' FREDERIC GrUTZKOW.v [rh s] IWitneSscS: y

G. W. M. SMITH, H. S. TLBBEY.`

closed vessel A may also represent a plan for c\f'apora' desire tosecure by LettersP-at-

